Milemoa님이걸어 놓으신 링크(UA EXPLORE 50K + 5K +$50 statement Credit)가 저는 작동하네요. 

Approval 후 CSR을 통해 아래와 같이 confirm 받았습니다. 

아래 빨간 하이라이트를 저는, 같은 보너스를 받은지가 24개월 지났으면 이 보너스 받는것이 available 하다로 해석했습니다.

(저는 처닝이 아니지만, 혹시 도움이 되시라고...)

You will receive 50,000 bonus miles after you have met 

$2,000 in new purchases within the first three months of 

the opening of your account. You will see these bonus 

miles post to your account six to eight weeks from the 

date the minimum spend was met.

? You will receive a $50 statement credit after your first

purchase. 

? You will earn 5,000 bonus miles by adding an authorized 

user and making your first purchase in the first three 

months of opening of your account.

These bonus offers are available to you as long as you 

have not received a new Cardmember bonus for this product 

in the past 24 months.